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annotate c/regexParser/transition.h @ 117:166136236891 pairPro

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author Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
date Wed, 25 Nov 2015 14:58:03 +0900
parents 66c633575b53
children 84a2a5209d3a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #include "bitVector.h"
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2
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3 typedef struct transition {
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4 CharClassPtr condition;
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5 BitVectorPtr nextState;
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6 struct transition *next;
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7 } Transition, *TransitionPtr;
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8
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9 typedef struct state {
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10 TransitionPtr transition;
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11 struct state *next;
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12 } State, *StatePtr;
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13 /*
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14 正規表現木を辿って transition のList をつくる
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15 CharClass のかさなりを判定して重なりのない新しいCharClassをつくる
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16 重なっている状態はbitvectorのorをとる
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17 重なっている状態はそれぞれの状態について木をたどる
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18
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19 nextState == 0 は正規表現の末端を表す
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20 nextState == 1 は受理状態を表す
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21 正規表現のノードの番号 n に対応する 2^n のbitをセットした状態
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22
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23 | の場合は両方のListを結合する
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24 + の場合は左のノードに * がある場合は右のリストも結合する
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25 左のノードに*がない場合は、右のほうだけみる
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26 * は直下のリストを使って、次の状態を自分自身にする
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27 */